Host intestinal and immune cells

Host intestinal and immune cells refer to the integrated system of the intestinal epithelium and the underlying gut-associated lymphoid tissue (GALT), which together maintain the body's largest interface with the external environment (Mowat & Agace, 2014). These cells perform critical functions including nutrient absorption, secretion of protective mucus, and the orchestration of immune tolerance versus active defense against pathogens (Okumura & Takeda, 2017). In diseases such as Crohn's disease and ulcerative colitis, the interaction between these cell types becomes dysregulated, leading to chronic inflammation and tissue damage (Neurath, 2017). While not a single molecular target, this cellular collective is the focus of therapeutic interventions that aim to block specific pathways, such as the alpha4beta7 integrin (targeted by Vedolizumab) or tumor necrosis factor-alpha (targeted by Infliximab), to restore intestinal homeostasis. Understanding the crosstalk between the intestinal barrier and the mucosal immune system is essential for developing targeted therapies for gastrointestinal and systemic inflammatory conditions (Abraham & Medzhitov, 2011). Furthermore, these cells are often the primary site of entry and replication for various enteric pathogens and viruses, making them a critical focus for anti-infective research (Mowat & Agace, 2014).

Other names

Gut-associated lymphoid tissueGALTIntestinal mucosaIntestinal epithelial and lamina propria cellsEnterocytes and mucosal leukocytes

Modulation of leukocyte trafficking, cytokine signaling, and epithelial barrier integrity within the gastrointestinal tract.